Target development and new radioactive ion beams for SPIRAL1 – GANIL

by Erwan Levillain (1st year PhD student)

A decade ago, SPIRAL1 went through a major upgrade. Based on the Isotope Separation On Line (ISOL) technique and exploiting a Target and Ion Source System (TISS), this facility uses several sources to deliver radioactive ion beams. However, only the “FEBIAD” source enables to extend the range of beams to iron-like (Fe, Co, Ni) elements.
Using a nickel-58 primary beam on a graphite target coupled with the FEBIAD, a production test was conducted in July 2024. This talk will present the radioactive ion beam intensities that were deduced from the data analysis.

As the thermal configuration of the TISS seems to be a limiting factor, we will discuss the needfor thermal simulation with the Ansys software. It requires an accurate collection of the thermal properties involved in the design. An experimental set-up has been developed for the measurement of these material properties. Thus, results will be used as inputs for a parametric model developed to improve the TISS performances through design optimization.

Keywords: Target Ion Source System, β decay, emissivity, thermal conductivity, electrical resistivity, fit.